Images

Grant Village boat dock, on the West Thumb of Yellowstone Lake, where a water-level sensor measures the level of the lake. Photo by David Mencin (EarthScope Consortium).

Photograph showing roadcut exposure of Huckleberry Ridge Tuff and Mesa Falls Tuff along U.S. Route 20 between Ashton and Island Park, Idaho. This exposure is approximately 60 feet high.

Dr. Jacob Lowenstern, Scientist-in-Charge of the Yellowstone Volcano Observatory during 2002-2017. In this photo, he's leading a field trip in Yellowstone National Park with a group of international volcanologists. 

Steam-driven vents on the floor of Yellowstone Lake in the Deep Hole, east of Stevenson Island. Image acquired by the Global Foundation for Ocean Exploration ROV Yogi in August 2017.

Changes in snow conditions at a gravity station in Yellowstone National Park in 2017. Each photo is taken from about the same location in May, July, August, and October of that year. The red circle in the May photograph shows the location of the gravity station in this area, which is near Craig Pass, a few miles southeast of Old Faithful.

Map of gravity stations measured in 2017 in Yellowstone National Park. Yellow lines are roads, dashed line marks the caldera boundary, black line outlines Yellowstone National Park, green circles note resurgent domes, and red dots are gravity stations.

WorldView-2 natural-color satellite image from December 9, 2017, showing thermal areas as snow-free zones on the north side of Mallard Lake resurgent dome in Yellowstone National Park.

Sunset lake in Black Sand Basin of Yellowstone National Park

View of the Silver Gate landslide complex from Bunsen Peak in Yellowstone National Park.  The landslide originates from Terrace Mountain.

A weir constructed by Irving Friedman and Dan Norton to measure water discharge and to monitor changes in hydrothermal activity on a tributary flowing into Boundary Creek in southwest Yellowstone National Park. USGS photo by Shaul Hurwitz, September 17, 2017.

Focal mechanism determined by moment tensor analysis, which uses a model to fit the long-period (~10 s period or greater) ground motion records recorded at multiple locations.

A newly emerged adult wetsalts tiger beetle. Photo by Robert K. D. Peterson, 2017.

Equipment for measuring carbon dioxide and methane emissions used to monitor changes at Steamboat Geyser in 2019. The white cylinder is the chamber, which is lowered to the ground. Gases emitted from the ground surface accumulate in the chamber. An instrument in the cart continuously measures gas concentrations and carbon isotope compositions.

Upright petrified tree in Yellowstone National Park. 

Amphitheater Mountain and Soda Butte Creek viewed from the Yellowstone National Park northeast entrance road. 

Fishing Cone, a small thermal feature near the shore of the West Thumb of Yellowstone Lake.

Hikers on Mount Everts near Mammoth Hot Springs, Yellowstone National Park.

Panoramic of the West Yellowstone rhyolite lava flow taken along Highway 20 (between the West entrance of Yellowstone National Park and Madison Junction). The flow is approximately 111,000 years old and has a volume of about 41 km³ (10 mi³). 

A geologist examples a basaltic lava flow along the Madison River, looking for an area that can yield samples suitable for ⁴⁰Ar/³⁹Ar geochronology.  USGS photo by Jorge Vazquez, June 2017.

Geophysicist Elske de Zeeuw-van Dalfsen (Royal Netherlands Meteorological Institute) collects a gravity reading from a station near Gibbon Falls in Yellowstone National Park. Gravity data collection was completed under Yellowstone National Park research permit 7074.

Photograph of eddy covariance and Multi-GAS stations that were deployed in a temporary configuration near Norris Geyser Basin in 2016. Research conducted under permit YELL-2016-SCI-7082.